<template>
  <div class="todo-header">
    <input
      type="text"
      placeholder="请输入你的任务名称，按回车键确认"
      @keyup.enter="createNewTodo"
      v-model.trim="newMsg"
    />
  </div>
</template>
<script>
import { nanoid } from 'nanoid';
export default {
  name: 'Header',
  props: ['addTodo'],
  data() {
    return {
      newMsg: '',
    };
  },
  methods: {
    /*
     */
    createNewTodo() {
      // 判断是否为空
      if (!this.newMsg) {
        return;
      }

      const newTodo = { id: nanoid(), todo: this.newMsg, done: false };
      this.addTodo(newTodo);

      // 清空输入框的数据
      this.newMsg = '';
    },
  },
};
</script>
<style scoped>
/*header*/
.todo-header input {
  width: 560px;
  height: 28px;
  font-size: 14px;
  border: 1px solid #ccc;
  border-radius: 4px;
  padding: 4px 7px;
}

.todo-header input:focus {
  outline: none;
  border-color: rgba(82, 168, 236, 0.8);
  box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075),
    0 0 8px rgba(82, 168, 236, 0.6);
}
</style>
